Closure for containers



E. A. oNElL 2,091,877" cLosuRE` FOR CONTAINERS l' K Filled sept. `9, 193e Jav` I n" y EW-awww a n lATTORNEYSk Patented Aug. 31,V 1937 y ul-uTED4 STATES PA-TiivNTO-FFICEM oLosURE Fon CONTAINERS Edward A. o'Neu, New roi-k, n.31'. Application september 9, 193s, y serial No. 99,999

n y y 4 Claims. The present inventionrelates to 'closures or f sealing devices forc'ontainers and the like, and moreparticularly `to articles Aof this character wherein is` provided a window or opening having 5 aclosure oftransparent material.

The primaryl object of the invention is to provide a closure or sealing device "adapted for use in conjunction with standard types of containers now in common use, the closure being formed of transparent material thereby affording visual inspection of the contents of the vcontainer with- 'out' destroying the seal thereof.

"Afurthe'r and more specific object resides in theA provision` of a sealing' device `foricontainers, the same comprising complemental ring members of novel form so that upon the application of pressure the ringl members will Vbe caused to securely grip a sheet oftransparent Jmaterial thereby forming a hermetic lseal forfthe container thru whichthe contents may be inspected.

A further object voi' the invention is to provide y'seal forming rings or flanges adapted to be af- 'fixed' to a metallic container or can, the novel formation of the ringsfbeing such as to `permit economic fabrication by the well-known production methods.

The invention will be fully and comprehensively understood from a consideration of the following detailed descriptionwhen read in connection with the accompanying drawing which forms part of the application.

In the drawing:

Fig. 1 is a perspective view of, a typical container or can including the sealing device ailixed thereto.

Fig. 2 is a central vertical section thru the container taken on line 2 2 of Fig. 1.

Fig. 3 is an enlarged fragmentary sectional view thru the sealing device illustrating the manner of crimping the sealing members to retain the transparent closure element.

Fig. 4 is a perspective view oi' theseveral sealing elements of the device; and

Fig. 5 is a sectional view similar to Fig. 3 but illustrating the elements arranged preparatory to forming the seal.

Briefly stated, the invention resides in the provision of a pair of complemental rings, yone of the rings being adapted for attachment to a suitable wall of the container, the rings being so formed that on the application of the pressure as by suitable dies, a disk of flexible transparent material is securely crimped or xed between the mentioned rings so as to form a `hermetic 55 seal for the container and thereby afford an in- (Cl. 220v-27) 1. spection opening thrujwhic'hl the contents container maybe readily examined.

yReference `'is now hadto the accompanying drawing for a more detailed description thereof in which thenurneral 6 indicates a typicalcontainer or can, the same being of cylindrical form having `end'walls l. Either lor bothof the' end walls 1 havev an aperture therein preferablyr centrallydisposed and thru which the contents of the container'may be removed; the aperture being preferablybordered by an 'inturned flange s., I l l l Into the aperture bordered by the flange 8 is inserted an assembled closure 9, the same comprising an inner ring Illjan outer ring II and a disk I2 of transparent` material suchjiorzex ample, as cellophane.' The'ring I0 forms the body of the closure 9. and comprises an upstanding cylindrical wall Il, having open ends, one end of which has an outwardly directed iiange4 formed thereon and its opposite end is inturned` to i'orm an annulus I5 from which projects',` at its,r Vinner edge. a cylindrical flange I6. `The free edge of the cylindrical flange I6 is preferably inturned as indicated vat I 'I to vform areinforcing ilange thereon.

` 'Ihe outer ringll is formedsimilarlyto portions of thelnnerring I0, it being composedof a ofthe cylindrical wall I 8 and an annulus I9 from the f inner edge .of which is formed a depending flange 20, the latter being formed in an inturned flange 2I at its free edge. It is to be noted here that 'the annuli I 5 and Ilare each inclined at a suitable degree in the same direction forming thereby a conical wall. It will be seen by reference to Fig. 3 that the confirmations of the ring Ill vand the ring Il serve to securely grip the disk i2 as the mentioned rings are subjected to pressure between suitable dies, during which the inclination, of the annuli I 5 and I9 serve to cause the crimpingv of the corresponding portions ofgg the rings I0 and II Vin substantially S-shapedv formation so as to securely grip the disk I2 therein, and thus form a hermetic seal.`

The mentioned dies employed in the as-` semblage of the closure device comprise merely an anvil having a. substantially flat surface and a cooperating plunger betweenwhich elements rings I0 and II are pressed. Preparatory to` assembling the closure device 9 by the application of pressure in the mentioned dies, the rings |01 and II and the disl; I2 are assembled in correlationsubstantially as illustrated in Fig. 5. At the application of pressure thel wall I8 of the ring II telescopes the wall Il of the ring I0, and

similarly the flange 20 slips over the flange I6 during which the marginal portions of the disk I2 are flanged cylindrically to be gripped between the flanges I6 and 20. As the application of pressure continues, a compound action takes place during which theanges IG and 20 being telescoped with each other are collapsed to the form shown in Fig.. 3 and coactively the annuli I5 and I9 are pressed into a substantially flat form between which marginal portions of the disk I2 are gripped. rorn this it will be seen that the periphery of the disk I2 is securely crimped between the rings I0 and II to take the .assembled form as shown in Fig. 3.

In the preferred embodiment of the invention as illustrated in the drawing, the container 6 is of the type usually employed for packaging powdered or pulverized dry materials such as baking powder, flour, etc. In this instance the closure 9 serves as a removable cover being withdrawn by the use of a tool under the flange I3 thereof. In such instances the closure 9 is frictionally engaged in the opening of the container specifically in the ange 8 thereof.

The closure 9 may be fabricated to form an integral and permanent part of the container 6, the same being assembled to the 'cylindrical wall thereof in the well-known manner usually employed in the sealing of metallic cans. In this instance the flange I3 of the closure 9 may be crimped over the ends of the cylindrical wall of the container 6 so that the assembled closure 9 entirely forms the end walls of the container 6. In this use of the invention, the disk I2 being of relatively soft material may be readily cut away toV open the container, and also afford inspection of the contents of the container before the sealV is broken. This `form is especially de-` sirous when the container is used for packaging liquid materials. In View of the frangible character of the transparent seal it will be noted that same is adapted to be broken for discharge of the contents and cannot therefore be replaced, thus rendering the container non-refillable.

It is to be understood that this improvement is capable of extended application and is not confined to the exact showing of the drawing nor to the precise construction described and, therefore, such changes and modifications may be made therein as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the appended claims.

What is claimed as new is:

1. A closure for a container and comprising a body having an opening therein, a collar member crimped to said body, said crimped portion being of substantially S-shaped formation, a closing member for the opening and having its marginal edge disposed between the body and the collar and clamped in the crimped portion to hermetically seal the opening.

2. Aclosure for a container and comprising a flanged body having an opening therein with the flange disposed about the opening, a flanged collar and the flange thereof and the flange of the body being crimped about each other in substantially S-shaped formation, and a closing disk having its marginal edge clamped in theY crimped portion to hermetically seal the opening.

3. A closure for a container and comprising a tubular body having an opening therein, a stepped flange on the body about the opening, a tubular collar telescopically mounted about the body, a stepped flange on the collar and the flange thereof and the Vflange of the body being crimped about each other in substantially S-shaped formation, and a disk of transparent material closing the opening and having its marginal edge disposed between the body and collar and clamped in the crimped portion to hermetically seal the opening.

4. A closure for a container and comprising a body for attachment to the container and including a cylindrical wall, an inwardly directed stepped flange formed on one end of the Wall, a collar including a cylindrical Wall telescopically mounted about the Wall of the body, an inwardly directed flange on the wall of the collar, said flanges being crimped about each other in substantially S-shaped formation and a fragile disk having its marginal edge clamped and hermetically sealed in the crimped portion.

EDWARD A. ONEIL. 

